Allyl phthalate pesticidal compositions



Ufliwd States a m ofim $092,543 1 I mommnrrnmndsrnononnmot ALLYL" rrmmrnm PESTICIDAL COMPOSITIONS I so... a. menu, can; to vm Cbzmleal c lea g ozlll aeorporafl onol NoDrawlng. Filed 9,196 Ser.N.10 m

12 cum-1 rs-l so This invention relates to new chemical compositions of matter. More specifically, this invention relates to new chemical compounds of the formula:

8 O S-l =(OR)t x lL-o-(cHm-lm-cm c-o-(ono ..-on=om wherein each X is independently selected from the group consisting of hydrogen, chlorine, and bromine atoms and unsubstituted lower alkyl and unsubstimted lower alkoxy radiczds, R is anunsubstituted alkyl radical containing from 1to3carbonatoms,andnisawholenumberh'om' Oto 1."I heaenewcompounds,useh1laspesticides,par-

ticularly as imecticidesandmiticides, are the 1:1 addition products of the dialkyl thioates where R is as defined above, with a suitable divinyl or diallyl phthalate. I

The suitable divinyl or diallyl phthalate reactants include divinyl phthalate and diallyl'phthalate, which are preferred reactants due to their greater availability, as well & the divinyl and diallyl esters of halo-, lower-alkyl-, or lower-alkoxy-substituted phthalic acid. Examples of the halo-, lower-alkyh, or lower-alkoxy-substituted pht'halic acids which can be esterified to divinyl or diallyl phthalate reactants of this invention by the common esterification techniques, for example, the vinyl interchange method or direct estcrification with allyl alcohol,

are: 3-chlorophthalic acid, 4-chlorophthalic acid, 3-- bromoph-thalic acid, 4-bromophthalic acid, 3-mcthylphthalic acid, 4-methylphthalic acid, S-ethylphthalic acid,

4-ethylphthalic acid, 4-methoxyphthalic acid, 3,4-dichloro- I molecular proportion of the divinyl or diallyl phthalete employed. While these are satisfactory proportions of reactants, itispreferred touseaslightexoeaaofthedialkyl phosphorodithioate. ,The reaction can be carried out satisfactorily in the of a solvent, but inert solvents or diluents such as benzene, toluene, or xylene can be-usedifdesired. Itisalsodesirabletoaddasmall amount of an oxidation inhibitor, such .as hydroquinone,

to the reaction mixture. The reaction temperature is not critical, but reaction temperatures in the range tram about normal room temperatureto about 100' C. are operable. Apreferredreacfiontemperatureisthereflux of a solution of the reaction mixture in a solvent or diluent, if one is used. While the exact reaction time is dependenton avarietyof factors, the additionreactions are generally complete within-30 hours. When the reactioniscompletednhereactionmixwreiscooledandtaken winawitablesolve'ntifonehasnotalreadybeenused in-thereaction. 'Ihesolutionisthenwashedfirstwitha dilute aqueous abase such assodium carbonatetoremoveanyexcessacid water. The solution is dried over an anhydrws drying agent such as sodium sulfate, and filtered. The solvent is then distilled ofiin vacuo to leave aresidueto the desired addition product, which is often sufliciently pure for use withwt fiurther purification. It desired, however, it can be by tractional v techniquesknowntothose'skilledintheart. g

Compounds of thisfinvention as representedby the structrn'al formulainwhichnisoareobtainedbyusing the appropriate divinyl phthalate as reactant with the dialkyl phosphorodithioate, while compounds in which n is lareobtainedbymingan appropriate diallylphthalate.

'l'hemannerinwhichthenewcompoundsofflfisinvention can be prepared is illustrated in the following examples. It is understood that although a specific divinyl or diallyl phthalalte reactant is specified in the examples for the purposeot illustration, other divinyl and diallyl phthalates within the scope of this invention may be'substituted therefor. t 1

EXAMPLE *1 Preparation of 2-(0,0-Dimethylphosphorodithio) 'Propyl Allyl Phthalare Diallyl phthalate (49.2 g.; 0.2 mol) and hydroquinone (0.1 g.) were placed into a 250 ml. round-bottom flask fitted witharefluxcondenser, meehanicalstirrer,andinternal thermometer, 0,0-dimethylphosphorodithioate (80 0.5 mol) was added portionwise with stirring. Thereafter the solution was heated and at 65 C. for approximately 22 hours. The solution was cooled to room temperature, diluted with benzene, washed first with 10% aqueous sodium carbonate solution, then with water, dried over anhydrous sodium aulfiate, and filtered. The benzene was distilled oil in vacuo, and the residue distilled to remove any unreacted diallyl phthalate as the fraction boiling l57-l65' C. at 4 mm. mercury. The residue therefrom was distilled in a falling film column to yield 2-(0,0-dimethylphoaphorodithio)-propyl allyl phthalate as a yellow liquid traction at 120' C. and 0.1 mm. mercury and having an index of refraction (D line) at 26 C. of 1.5480 and the following elemental analysis as calculated for c u rsp Theoretical, percent 41. 54 Found, percent EXAMPLEZ Preparation of 1 (0,0-Dimethylphoiphorodilhio) Ethyl Vinyl Phthalate hydrous aodium sulfate, and filtered. 'Ihe. benzene is removedin vacuo, and the residue distilled in vacuo to hisriti J te-' .1953

orcther spouses recover any unreacted divinyl phthalate. Further distil- I lation in vacuo of the residue yields 1-(0,0-dimethylphoephorodithio)ethyl vinyl phthalate.

EXAMPLE 3 Diallyl 3-chlorophthalate (56.3 g.; 0.2 mol) and hydroquinone (l g.) are mixed and 0,0 limethyl phosphorodithioate (48 g.; 0.3 mol) is slowly added with stirring. The solution is heated at 70' C. for about 18 hours. Upon cooling the solution is diluted with benzene, washed with 10% aqueous sodium carbonate solution, washed with water, dried over anhydrous sodium sulfate, and filtered. The benzene is removed in vacuo, and the residue distilled in vacuo to yield 2-(0,0-dimethylphosphorodithio)propyl ally] S-chIorophthalate.

Other useful compounds within the scope of this invention can be prepared in the manner detailed in the previous examples. Given in the following examples are the reactants required to prepare the indicated named compounds of this invention;

EXAMPLE 4 Diallyl phthalate+0,0-diethyl phosphorodithioate=2- (0,0-diethylphosphorodithio)propyl allyl phthalate.

EXAMPLE 5 Diallyl phthalate+0,0-di-n-propyl' phosphorodithioate= 2 (0,0 di n propylphosphorodithio)propyl allyl phthalate.

EXAMPLE 6 Divinyl phthalate+0,0 diethyl phosphorodithioate=l-(0,0-diethylphosphorodithio)ethyl vinyl phthalate.

EXAMPLE 7 Divinyl phthalate+0,0-di-n-propyl phosphorodithioate=l-(0,0 di n propylphosphorodithio)ethyl vinyl phthalate.

EXAMPLE 8 Diallyl 4-chlorophthalate+0,0-dimethyl phosphorodithioate=2-(0,0-dimethylphosphorodithio)propyl allyl 4- chlorophthalate.

EXAMPLE 9 Diallyl 4,5-dichlorophthalate+0,0-dimethyl phosphm rodithioate=2 (0,0 dimethylphosphorodithio)propyl allyl tseammmmm.

EXAMPLE l0 Divinyl 3-bromophthalate+0,0-diethyl phosphorodithioate=l-(0,0-diethylphosphorodithio)ethyl vinyl 3- bromophthalate.

EXAMPLE ll Diallyl 3-methylphthalate+0,0-dimethylphosphorodithioate=2 (0,0 dimethylphosphorodithio)propyl allyl 3-methylphthalate.

EXAMPLE l2.

Divinyl 3,4 dimethylphthslate+0,0 dimethyl phosphor0dithioate=l (0,0 dimethylphosphorodithro) ethyl vinyl 3,4-dimethylphthalate.

EXAMPLE l3 Diallyl 3,4,5-trimethoxyphthalate+0,0-dimethyl phosphorodithioate=2 (0,0 dimethylphosphorodrthro)- propyl allyl 3,4,5-trimethoxyphthalate.

EXAMPLE l4 Diallyl 3,4,5,6 tetrachlorophthalate-l-QO dimethyl phosphorodithioate=2 (0,0-dimethylphosphorodithio)- propyl allyl 3,4,5,6-tetrachlorophthalate.

The utility of the compounds of this invention was illustrated, for example, by experiments carried out for the control of insects by feeding. The test compounds were formulated as 10% wettable powder concentrates by adding to an inert carrier and grinding to a uniform blend on a ball mill. The respective formulations were diluted with water to the desired concentrations of actual chemical. Cranberry bean plants were dipped in appropriate concentrations of the various formulations and allowed to dry. Third instar stage larvae of the insects were then caged on the treated plants and maintained under greenhouse conditions for 48 hours, after which time observations of mortality were made. Three replicates were used for each level of application. In these experiments, the product of Example 1 gave the following results:

The utility of the compounds of this invention was further illustrated by experiments carried out for the systemic control of two spotted spider mites by root absorption and translocation. The test compounds were dissolved in acetone and dispersed in distilled water at the desired concentrations of actual chemical. Host plants, infested with mixed life stages of the mites, were uprooted, washed free of soil, and placed in glass jars containing 100 p.p.m. of the dispersed test compound. Aluminum foil was placed around the plant stem and iar to reduce possible escape of toxic vapors from the test dispersion. The test plants were maintained in this manner in the greenhouse for seven days and then observed for systemic miticidal efiectiveness. Three replicates were used for each treatment. In these e nslts, the product of Example 1 gave the following 1' ts:

Ooncm, p.p.m. Organism Percent Mortality 100 Two Spotted Spider Mites 02.8 0.0 (Control) do 0. 0

to give homogeneous, free-flowing dusts by admixing the active compound or compounds of this invention with finely divided solids such as the tales, natural clays, pyrophyllite, diatomaceous earth, fuller's earth, or hours such as walnut shell or wheat flours. Other inert solid carriers of the type ordinarily used in preparing pest control compositions in dusts or powdered form can also be used.

Liquid compositions according to this invention are prepared by admixing one or more of the new compounds of this invention with a suitable inert liquid diluent. In some cases the compounds are sufiiciently soluble in the common pesticide solvents such as kerosene, xylene,

' fuel oil, the alltylated naphthalenes, and the like so that dispersed in water or other liquids to give sprays, which are a preferred method of applying the active compounds of this invention. Other pesticides as well as such substances as fertilizers, activators, adhesives, Spreaders, and synergists can be added to these formulations if desired.

The active compounds of this invention are applied in amounts sufiic-ient to exert the desired pesticidal action. The amount of the active compound present in the pesticidal compositions as actually applied for preventing or controlling pest infestations varies with the type of application, the particular species which are to be controlled, the purpose for which the treatment is made, and the like. Generally, the solid or liquid compositions of this inventionwill contain up to about 90% of the active compounds.

I claim:

1. A compound of the formula ll O S-P J; R); x -o-wnm-n-cm X CO(CH;)..CH=CH:

4. 2 (0,0 dipropylphosphorodithio)propyl al-lyl phthalate.

5. 1-(0,0-dimethylphosphorodithio) ethyl vinyl phthalate.

6. 1-(0,0-diethylphosph0rodithio)ethyl vinyl phthalate.

7. 1-(0,0-dipropy1phosphorodithio)ethyl vinyl phthalate.

8. 2 (0,0 dimethylphosphorodithio)propyl allyl 3- chlorophthalate.

9. 2 (0,0 dimethylphosphorodithio)propyl allyl 4- chlorophthalate.

10. 2-(0,0-dimethy1phosphorodithio)propyl allyl 4,5- dichlorophthadate.

11. An insecticidal and miticidal composition comprising an inert carrier and a toxic amount of a compound of claim 1.

12. A method of destroying undesirable insects and mites which comprises contacting these pests with an insecticidal and miticidal composition comprising an inert carrier and as the essential active ingredient, in a quantity which is toxic to said pests, a compound of claim 1.

References Cited in the file of this patent Frank et a l Apr. 18, 1961 

1. A COMPOUND OF THE FORMULA 